The European Banking Authority published two reports on the consistency of RWAs across large EU institutions for large corporate, sovereign and institutions' IRB portfolios, (collectively referred to as "low default portfolios" - LDP), as well as for the calculation of counterparty credit risk (CCR) exposures under the Internal Model Method (IMM) and the credit value adjustments (CVA) according to the advanced approach (ACVA).
The LDP analysis explains how much of the variability in RWAs is led by difference in riskiness – i.e., idiosyncratic portfolio features – and tries to identify residual drivers that are linked to banks' practices. A key finding is that three-quarters of the observed difference in ‘global charge' (GC) levels across institutions could be explained by the proportion of defaulted exposures in the portfolio and the portfolio mix. When looking at each portfolio separately, the analysis shows that the impact of defaulted exposures explains about 40% of the GC differences for the large corporate portfolios, while the remaining 60% may be due to differences in bank-specific factors, such as risk management practices.
As for the CCR and ACVA analyses, which have been carried out in close cooperation with the Basel Committee for Banking Supervision (BCBS), the report shows that there is significant variability across banks in the calculation of counterparty credit risk and advanced credit value adjustments, especially for equity and foreign exchange OTC derivatives.
These findings will inform the work the EBA is conducting for improving the regulatory framework and restoring confidence in internal models. A deeper understanding of what drives differences in RWAs will allow the EBA to explore a number of options to address specific concerns, as put forward in the EBA report on CVA as well as in the discussion paper on the future of the IRB Approach published by the EBA in February and March 2015 respectively.
Press release
EBA report on CCR benchmarking 2014
EBA results from the 2014 Low Default portfolio (LDP) exercise
© EBA
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